Article
Chemistry, Multidisciplinary
Ping Wang, Mohammed J. Meziani, Yingqiang Fu, Christopher E. Bunker, Xiaofang Hou, Liju Yang, Hind Msellek, Melina Zaharias, Jasmine P. Darby, Ya-Ping Sun
Summary: Carbon dots (CDots) are surface-passivated small carbon nanoparticles, which can serve as excellent fluorescence sensors for organic analytes and metal ions. However, some dot samples used in studies are actually nano-carbon/organic hybrids with highly porous structures that play a dominant role in sensing results. The tradeoffs between sensitivity, accuracy, and reproducibility in using these hybrid materials for fluorescence sensing are discussed.
NANOSCALE ADVANCES
(2021)
Article
Spectroscopy
Furong Wu, Yongkang Zhang, Yan Li, Yuhang Wang, Junjie Ma, Fengping Wang
Summary: This study investigates the effect of light with different wavelengths on realgar, a well-known light-sensitive material. It is found that realgar is stable under red light but sensitive to amber, green, and blue light. The fastest light-induced reaction of realgar occurs under green light, while the effect of blue light on realgar is more complicated.
JOURNAL OF RAMAN SPECTROSCOPY
(2022)
Article
Chemistry, Multidisciplinary
Audrey F. Adcock, Weixiong Liang, Peter A. Okonjo, Xiuli Dong, Kirkland Sheriff, Ping Wang, Isaiah S. Ferguson, Shiou-Jyh Hwu, Ya-Ping Sun, Liju Yang
Summary: The carbon/TiO2 hybrid dots are nanoparticles composed of carbon and TiO2, which exhibit potent antibacterial properties when exposed to visible light. These hybrid dots can cause significant damage to the bacterial cell membrane, inhibiting bacterial growth.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Multidisciplinary
Yangbin Xie, Songshan Dai, Yue Wang, Xi Wang, Ying Sun, Zhenghua Ju, Ran Fang, Baoxin Zhang, Jincai Wu, Xiaoxiang Zhang, Xiaobo Pan
Summary: In this study, a single-component organic triarylborane compound was synthesized, and different phosphorescence behaviors were observed in racemate and conglomerate crystals. Racemate crystal exhibited color-tunable emission, while conglomerate crystal showed no emission. The luminescence behaviors were found to be due to the change in molecular conformation upon photoexcitation or temperature variation. This study provides a new design strategy for achieving color-tunable emission in organoborane molecules.
Article
Optics
Dinesh Kumar Pyne, Shovon Chatterjee, Tuyan Biswas, Prosenjit Saha, Partha Dutta, Arnab Halder
Summary: This study demonstrates a strategy to enhance the luminescence of graphene oxide materials by synthesizing cerium ion incorporated graphene oxide nanoparticles. The origin of luminescence enhancement in GO-Ce NPs is attributed to the binding interaction between cerium ions and GO NPs as well as the structural orderness in the presence of cerium. Experimental observations suggest a mechanism involving photoinduced reduction of non emissive Ce(IV) to form luminescent Ce(III) accompanied with energy pumping of cerium by photoexcited GO NPs.
JOURNAL OF LUMINESCENCE
(2021)
Article
Biochemistry & Molecular Biology
Aoife Taylor, Shaowei Zhang, Linus O. Johannissen, Michiyo Sakuma, Robert S. Phillips, Anthony P. Green, Sam Hay, Derren J. Heyes, Nigel S. Scrutton
Summary: Different structural models of the photoenzyme protochlorophyllide oxidoreductase (POR) have been examined by experimental and computational approaches. A new structural model for the cyanobacterial POR ternary enzyme-substrate complex is presented, together with a discussion of the implications for the potential mechanism of how light energy can be harnessed to facilitate enzyme catalysis.
Article
Chemistry, Physical
J. M. Arroyave, R. E. Ambrusi, Y. Robein, M. E. Pronsato, G. Brizuela, M. S. Di Nezio, M. E. Centuri
Summary: The structural characterization of Carbon dots (Cdots) was conducted using a combination of experimental and theoretical results, correlating synthesis methods with spectroscopic data to identify Polymer dots (PDs) and/or polymer Carbon dots (PCDs) structures. Density functional theory calculations were utilized to predict UV-visible and IR spectra behavior, providing a useful tool for understanding Cdots structures.
APPLIED SURFACE SCIENCE
(2021)
Review
Biochemistry & Molecular Biology
Abhilasha Singh, Sharmila Basu Modak, Madan M. Chaturvedi, Jogeswar S. Purohit
Summary: The nuclear events in eukaryotic cells, such as replication, transcription, recombination, and repair, are mediated by chromatin remodeling. The SWI/SNF chromatin remodeling complexes play crucial roles in modulating chromatin and have implications in cancer and health-related anomalies. Understanding the structure and function of the SWI/SNF complex is challenging due to the complexity of higher-order chromatin and compositional heterogeneity. This review aims to provide a comprehensive perspective on the discovery, structure, function, and regulation of the SWI/SNF complex.
CELL BIOCHEMISTRY AND BIOPHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Chenhui Wang, Junhu Cai, Yuanyuan Ye, Xinpei Hu, Lijuan Zhong, Hongxing Xie, Enguo Chen, Yun Ye, Sheng Xu, Jie Sun, Qun Yan, Tailiang Guo
Summary: In this study, full-visible-spectrum all-inorganic perovskite quantum dots (IPQDs) were successfully synthesized using an environmentally friendly ion-exchange approach with a renewable and low-cost anion exchange resin. The introduction of the anion exchange resin improved the optical performance and surface morphology of the IPQDs. The emission wavelength of the IPQDs could be controlled without changing their crystal phase, and IPQDs with poor morphology and unstable structure could be selectively removed. The photoluminescence quantum yield and fluorescence lifetime of the IPQDs were dramatically improved. This research provides new ideas for the environmentally friendly and sustainable synthesis of IPQDs, and shows great potential in the display field.
Article
Optics
Zhihao Chen, Shiliang Mei, Haiyang He, Zhuoqi Wen, Zhongjie Cui, Bobo Yang, Dan Yang, Wanlu Zhang, Fengxian Xie, Jun Zou, Ruiqian Guo
Summary: This study presents an efficient large-scale synthesis method for solid-state CsPbX3 PQDs across the full visible spectra, using 3-Aminopropyltrimethoxysilane as ligands at room temperature in open air. The obtained green CsPbBr3 solids exhibit outstanding optical performance with high color purity and photoluminescence quantum yield, as well as improved thermal stability, photo stability, and long-term stability compared to naked CsPbBr3 QDs. The white LED fabricated using the green CsPbBr3 QDs solid powders and commercial red K2SiF6: Mn4+ phosphor with a blue LED chip displays high luminous efficiency and wide color gamut.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Rafal Kosman, Adam Olejniczak, Miroslawa Pawlyta, Oleksii Bezkrovnyi, Bartlomiej Cichy
Summary: This work investigates the spectral implications of doping AgInS2 quantum dots with Zn2+ and its higher homologues Cd2+ and Hg2+. The study utilizes comprehensive spectroscopic measurements and theoretical predictions to analyze the effects of alloying AgInS2 quantum dots with IIB group atoms. It is observed that each admixture induces a distinct spectral response, with Cd2+ and Hg2+ ions showing a complete reversal of character. The differences in spectra are associated with changes in defect structures and relaxation pathways. The study finds that Zn2+ ions have a weak impact on the emission properties, while Cd2+ and Hg2+ ions have the highest impact. Doping with Cd2+ deactivates relaxation pathways, resulting in shortened photoluminescence lifetime and partial band symmetrization. Conversely, doping with Hg2+ ions leads to the formation of metallic Hg-Ag complexes on the surface, displaying anomalous behavior in Hg-doped AgInS2 quantum dots.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Demid S. Abramkin, Mikhail O. Petrushkov, Dmitrii B. Bogomolov, Eugeny A. Emelyanov, Mikhail Yu. Yesin, Andrey V. Vasev, Alexey A. Bloshkin, Eugeny S. Koptev, Mikhail A. Putyato, Victor V. Atuchin, Valery V. Preobrazhenskii
Summary: In this study, the formation, structural properties, and energy spectrum of self-assembled GaSb/AlP quantum dots (SAQDs) were investigated. The growth conditions for SAQDs were determined on both GaP and GaP/Si substrates. The relaxation of strain in SAQDs on GaP/Si substrates did not affect the luminescence efficiency, while the introduction of dislocations in GaP-based SAQDs led to a quenching of luminescence. The energy spectrum of GaP/Si-based SAQDs was found to be of type II with an indirect bandgap.
Article
Biochemistry & Molecular Biology
Natalia Zamorano Cuervo, Nathalie Grandvaux
Summary: Protein disulfide isomerases (PDIs) are enzymes that catalyze redox reactions and have chaperone functions in protein folding. PDIs have catalytic thioredoxin (TRX)-like domains with CXXC motifs for redox reactions, as well as non-catalytic TRX-like domains. Strategies for identifying cysteine oxidative post-translational modifications (Cys ox-PTMs) have been optimized, and analysis of a Cys redoxome dataset suggests the presence of a non-catalytic thiol-disulfide motif in PDIs. Further structural analysis and exploration of other PDIs are needed to understand the role of these motifs.
Article
Chemistry, Physical
Michael Nazarkovsky, Bozena Czech, Alicja Zmudka, Viktor M. Bogatyrov, Olena Artiushenko, Vladimir Zaitsev, Tatiana D. Saint-Pierre, Rafael C. Rocha, Jiang Kai, Yutao Xing, Wellington D. G. Goncalves, Amanda G. Veiga, Maria Luiza M. Rocco, Syed Hamza Safeer, Mariia Galaburda, Victor Carozo, Ricardo Q. Aucelio, Richard J. Caraballo-Vivas, Olena Oranska, Jairton Dupont
Summary: Novel colorized zinc oxide-nanosilica composites were synthesized and analyzed, showing a direct correlation between ZnO concentration and color/optical properties. The most active sample had a higher ZnO concentration and exhibited significant visible light absorbance and luminescence. XPS studies revealed the formation of nanocomposites and impurities in ZnO that contributed to the optical and catalytic behavior, confirming the potential for wastewater detoxification.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Computer Science, Hardware & Architecture
Robin Matzner, Daniel Semrau, Ruijie Luo, Georgios Zervas, Polina Bayvel
Summary: The key goal in optical network design is to introduce intelligence in the network and deliver capacity when and where it is needed. Traditional synthetic graph models like Erdos-Renyi and Barabasi-Albert may not accurately represent the real optical networks, and introducing signal-to-noise ratio in the modeling process can better reflect the performance of optical networks. This new approach can capture both the effects of graph structure and physical properties to generate better networks, leading to significantly increased network throughputs while saving fiber.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2021)
Article
Materials Science, Multidisciplinary
Lin Ge, Hailong Yu, Haitao Ren, Bo Shi, Qian Guo, Wensheng Gao, Zhaoqing Li, Jiangong Li
JOURNAL OF MATERIALS SCIENCE
(2017)
Article
Chemistry, Physical
Gregory E. LeCroy, Ping Wang, Christopher E. Bunker, K. A. Shiral Fernando, Weixiong Liang, Lin Ge, McIver Reibold, Ya-Ping Sun
CHEMICAL PHYSICS LETTERS
(2019)
Article
Materials Science, Multidisciplinary
Lin Ge, Guangkuo Hu, Bo Shi, Qian Guo, Lu Li, Libin Zhao, Jiangong Li
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2019)
Article
Materials Science, Multidisciplinary
Lin Ge, Guangkuo Hu, Fengjiao Zhao, Xinyi Wang, Zhonglin Ma, Ronghan Liu
Summary: PEI/AA-CDots with high fluorescence quantum yield and selective quenching properties were successfully prepared for detecting Cu2+ and Hg2+ ions. The quenched fluorescence can be recovered by introducing aspartic acid or L-cysteine.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)